Diamox (acetazolamide) can be used to support acclimatisation and may reduce the likelihood of developing Acute Mountain Sickness (AMS). It works by stimulating breathing and improving oxygenation, particularly during sleep, which can help the body adjust more efficiently to altitude.
However, Diamox does not prevent altitude sickness and it is not a substitute for proper acclimatisation. You can still develop AMS while taking it, especially if you ascend too quickly or ignore early symptoms.
Your safety at altitude is determined far more by how you ascend than by whether you take medication. A well-designed itinerary, gradual increases in sleeping altitude, appropriate rest days, good hydration, and early recognition of symptoms remain the most effective ways to prevent AMS. These fundamentals are what keep people safe in the mountains.
For this reason, we do not recommend the routine use of Diamox on our trips. Our itineraries are specifically designed to allow for natural acclimatisation, giving your body the time it needs to adapt properly. In our experience, this approach is safer, more reliable, and leads to a better overall experience at altitude.
Diamox does have a place in certain situations. It may be appropriate for individuals with a history of altitude illness, those with limited time to acclimatise, or where a more rapid ascent is unavoidable. If you are considering using Diamox for altitude sickness, you should speak to a qualified medical professional before your trip to ensure it is appropriate for you and to understand the correct dosage and potential side effects.
We’ve written a more detailed article on this topic, including where Diamox can be useful, where it is often misunderstood, and how to approach altitude more safely. You can read it here: The Diamox Dilemma.
